641822792 has 60 divisors (see below), whose sum is σ = 1328761245. Its totient is φ = 290636736.

The previous prime is 641822761. The next prime is 641822801. The reversal of 641822792 is 297228146.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 8 ways, for example, as 176730436 + 465092356 = 13294^2 + 21566^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=17914.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 12109838 + ... + 12109890.

Almost surely, 2^641822792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641822792

641822792 is an abundant number, since it is smaller than the sum of its proper divisors (686938453).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641822792 is an frugal number, since it uses more digits than its factorization.

641822792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 68 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 641822792 is about 25334.2217563516. The cubic root of 641822792 is about 862.5912435011.

The spelling of 641822792 in words is "six hundred forty-one million, eight hundred twenty-two thousand, seven hundred ninety-two".